question_answer

A frictionless track ABCDE ends in a circular loop of radius R. A body slides down the track from point A which is at a height h = 5 cm. Maximum value of R for the body to successfully complete the loop is                  [MP PMT/PET 1998]

A)                                 5 cm          

B)                                    \[\frac{15}{4}\,cm\]                

C)                 \[\frac{10}{3}\,cm\]       

D)                 2 cm